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Friday, September 7th 2018, 12:56pm

Air keeps building in Irritrol 205 valve

I have an Irritrol 205 valve that keeps building air while running. Doesn't seem like a backflow issue since it litterally happens while running. If I air it out and after I tighten the Air Screw I can hear the air keeps building until the sprinklers don't work anymore.
I have changed the internals several times and also and I can normally get it functioning for a while, but then it starts back over.
Whats even stranger is that this valve is number two in a series of 5 valves sitting right next to each-other. None of the other valves have issues with air buildup.

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